Advertisements
Advertisements
Question
A boy walks from his classroom to the bookshop along a straight corridor towards North. He covers a distance of 20 m in 25 seconds to reach the bookshop. After buying a book, he travels the same distance in the same time to reach back in the classroom. Find (a) average speed, and (b) average velocity, of the boy.
Advertisements
Solution
a) Distance travelled is the length of the actual path covered.
Total distance covered in going and coming back :
= (20 + 20) m
= 40 m
Total time taken, = (25 + 25) s
= 50 s
So, we can calculate average speed as :
`"Average Speed" = "Total distance travelled"/"Time"`
Average speed for the entire journey ;
= `40/50`
= 0.8 m/s
APPEARS IN
RELATED QUESTIONS
Under what conditions can a body travel a certain distance and yet its resultant displacement be zero ?
A body travels a distance of 3 km towards East, then 4 km towards North and finally 9 km towards East.
What is the resultant displacement ?
What can you say about the nature of motion of a body if its displacement-time graph is A curve.
A ball moves on a smooth floor in a straight line with uniform velocity 10 m s-1 for 6 s. At t = 6 s, the ball hits a wall and comes back along the same line to the starting point with the same speed. Draw the velocity-time graph and use it to find the total distance travelled by the ball and its displacement.
Write an expression for the distance S covered in time t by a body which is initially at rest and starts moving with a constant acceleration a.
Can you suggest the kind of motion of a body from the following distance – time graph?
Write the SI units for measurement of distance and displacement.
Calculate the distance and displacement in the following case:
Which of the following figures represent uniform motion of a moving object correctly?
In which of the following cases of motions, the distance moved and the magnitude of displacement are equal?
